minor #18569 Fix typo (jmsche)

This PR was merged into the 5.4 branch.

Discussion
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Fix typo

Commits
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3f53254 Fix typo

Author: javiereguiluz

console/input.rst

@@ -375,7 +375,7 @@ Testing the Completion script
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 
 The Console component comes with a special
-:class:`Symfony\\Component\\Console\\Tester\\CommandCompletionTester`` class
+:class:`Symfony\\Component\\Console\\Tester\\CommandCompletionTester` class
 to help you unit test the completion logic::
 
     // ...